saviour, n. (US savior)
1 a person who saves or delivers from danger, destruction, etc. (the saviour of the nation).
2 (Saviour) (prec. by the, our) Christ.
Etymology
ME f. OF sauv{euml}our f. eccl.L salvator -oris (transl. Gk soter) f. LL salvare SAVE(1)
Also see definition of "saviour" in Bible Study Dictionaries